191846-86-3

Basic information

• Product Name: Benzene, 1,3-dibromo-5-ethynyl-
• CAS NO: 191846-86-3
• Molecular Formula: C8H4Br2
• Molecular Weight: 259.928
• Mol File: 191846-86-3.mol
• Article Data: 8

Chemical Properties

• CAS DataBase Reference: Benzene, 1,3-dibromo-5-ethynyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Benzene, 1,3-dibromo-5-ethynyl-(191846-86-3)
• EPA Substance Registry System: Benzene, 1,3-dibromo-5-ethynyl-(191846-86-3)

Safety Data

• Hazardous Substances Data: 191846-86-3(Hazardous Substances Data)

Upstream product

• 313691-72-4 4-(3',5'-dibromophenyl)-2-methyl-3-butyn-2-ol 
• 558-13-4 carbon tetrabromide 
• 56990-02-4 3,5-dibromobenzaldehyde 
• 19752-57-9 1,3-dibromo-5-iodobenzene 
• 1066-54-2 trimethylsilylacetylene 
• 135853-29-1 3',5'-dibromo-2-phenyl-1-(trimethylsilyl)acetylene 
• 1435-51-4 1,3-dibromo-5-fluorobenzene 
• 626-39-1 1,3,5-trisbromobenzene 
• 219633-70-2 1,3-dibromo-5-(3-hydroxyprop-1-ynyl)benzene 

Downstream Products

• 1031820-54-8 1,3-dibromo-5-[(4-methoxyphenyl)ethynyl]benzene 
• 1031820-42-4 4-(3,5-dibromophenyl)-3,6-di(2-pyridyl)pyridazine 
• 7567-63-7 1,3,5-Triethynylbenzene 
• 1263771-59-0 [1-(3,5-dibromophenyl)vinyl]dimethyl(2-vinylphenyl)silane 
• 1040264-90-1 C₃₄H₄₃Br₂N₇O₇S 

Relevant articles and documents

Synthesis, in-situ membrane preparation, and good gas permselectivity of insoluble poly(substituted acetylene)s loosely cross-linked with short and soft siloxane and silanol linkages

Insoluble but membrane-formable poly(substituted acetylene)s loosely cross-linked by short and soft Si–O–Si and SiOH---(OH)Si linkages have been synthesized from the corresponding monomers having one or two SiOH groups. These monomers have been polymerized in homogeneous systems to produce homogeneous polymer solutions in toluene. The resulting solutions were cast on polytetrafuluoroethylene sheets followed by evaporation of the solvent to give tough and flexible membranes which were completely insoluble. The membranes showed good oxygen and carbon oxide permselectivity and their plots in PO2 vs PO2/PN2 graph exceeded the 1991 Robeson's upper bound and very close to the 2008 Robeson's upper bound. The excellent selectivity are caused by enhancement of diffusion selectivity by the soft network structure which can create small pores (i.e., ultramicro pores) based on the short linkages. No drop in permeability may be due to the soft Si–O–Si and SiOH---(OH)Si linkages. In addition no change in PO2 and PO2/PN2 by aging was observed.

COMPOUND FOR ORGANIC OPTOELECTRONIC DEVICE, ORGANIC OPTOELECTRONIC DEVICE AND DISPLAY APPARATUS

The present invention relates to a compound for an organic optoelectronic device represented by chemical formula 1, an organic optoelectronic device employing the same and a display device apparatus. The details of chemical formula 1 are as defined in the specification.

A copper (II) (II) composite chlorinating agent and copper-based composite chlorinating agent synthesis of 1-chloro-2-aryl acetylene method

The invention discloses a copper (II) composite chlorinating agent and a method for synthesizing 1-chlorine-2-aryl acetylene based on the copper (II) composite chlorinating agent. The structural formula of the copper (II) composite chlorinating agent is CuCl2.xNaCl.yAl2O3. The chlorinating agent is applicable to chlorination of various substituted aryl acetylene substrates, and is high in universality; the chlorinating agent can directly carry out chlorination reaction on aryl acetylene so as to obtain a 1-chlorine-2-aryl acetylene product; the method is mild in reaction condition, 1-chlorine-2-aryl acetylene can be synthesized with high yield and high selectivity, and the production cost of the 1-chlorine-2-aryl acetylene derivative is greatly lowered.